The present invention discloses a kind of embellishing method of nano SiO2 used for producing PVDF compound membrane. It belongs to material producing technology of compound membrane. The method includes following specific steps: dissolve silicon hydride into acetone or toluene to form dissolve silicon hydride solution, after dispersed in ultrasonic, add pure acetic acid to adjust pH value as mixed. After reacting 1 - 3 hours, add ammonia to adjust pH, and add SiO2 nanometer particles to control the quality proportion of SiO2 and silicon solution, increase temperature to have coupling reaction, dry the produce in vacuum drying oven for 6 - 10 hours at 80 Deg. C, then get the nanometer SiO2 used for producing PVDF compound membrane. The advantage is: produce SiO2 nanometer particles covered by silicon hydride according to structure and performance characteristics of PVDF membrane. These particles are uneasy to polymerize, so can be equably dispersed in polymers. |